Results 81 to 90 of about 16,230 (293)

Dual‐Wavelength Switchable Focusing via a Fabry‐Pérot Resonance‐Enabled Hydrogel Metalens

Advanced Physics Research, EarlyView.
A hydrogel metalens is demonstrated for dual‐wavelength switchable focusing based on Fabry‐Pérot resonance. Under the low relative humidity, the metalens exclusively focuses light with a resonance wavelength of 470 nm and directly reflects light of other wavelengths.
Xiaofeng Dong, Yufeng Zha, Tianyu Liu, Qijun Yan, Leyi Ren, Zhipeng Qian, Jiao Tang, Qianqian Zhou, Degao Xu, Wen‐xing Yang, Chenjie Dai   +10 more
wiley   +1 more source

Label-Free Optical Resonator-Based Biosensors

Sensors, 2020
The demand for biosensor technology has grown drastically over the last few decades, mainly in disease diagnosis, drug development, and environmental health and safety.
Donggee Rho, Caitlyn Breaux, Seunghyun Kim   +2 more
doaj   +1 more source

Multifunctional Metasurfaces for Bridging Terahertz Waves in Free Space and Waveguides

Advanced Physics Research, EarlyView.
A multifunctional terahertz metasurface capable of simultaneous orthogonal polarization conversion and phase modulation is integrated onto a dielectric slab waveguide, thereby enabling efficient free‐space‐to‐guided‐wave coupling. By implementing tailored phase gradients on the metasurface, we demonstrate the formation of a focused spot within the ...
Jinhui Lu, Yushan Chen, Min Zhang, Hong Su, Ling Li, Huawei Liang   +5 more
wiley   +1 more source

Fluorene‐based blue emitters: On the path to electrically pumped organic lasers

FlexMat, EarlyView.
Electrically pumped efficient operation remains unrealized, a major challenge in optoelectronics. Fluorene‐based blue‐emitting semiconductors are promising gain media, thanks to their structural tunability and favorable emission properties. This review summarizes recent advances, highlights their reliability and versatility in lasing, and outlines key ...
Yong Yan, Hao Li, Mengna Yu, Huiyin Wang, Jiangqiang He, Menghan Wu, Quanyou Feng, Linghai Xie   +7 more
wiley   +1 more source

Influence of diffraction on the spectrum and wavefunctions of an open system

, 2000
In this paper, we demonstrate the existence and significance of diffractive orbits in an open microwave billiard, both experimentally and theoretically.
E. J. Heller, E. J. Heller, G. L. James, G. Vattay, H. J. Stöckmann, J. A. Katine, J. B. Keller, J. S. Hersch, J. S. Hersch, J. Stein, L. C. Maier, M. C. Gutzwiller, M. F. Crommie, M. R. Haggerty, M. Sieber, N. Pavloff, N. Whelan, R. G. Kouyoumjian, S. Gokirmak, S. Sridhar, Y. S. Chan   +20 more
core   +1 more source

Recent advances in organic broad‐spectrum photodetection materials and devices

InfoMat, EarlyView.
Graphical Abstract This review systematically outlines the evolution of organic photodetectors from fullerene‐based to advanced non‐fullerene acceptors, highlighting how molecular engineering (e.g., D–A, quinoidal, and A‐D‐A′‐D‐A architectures) extends spectral response into the short‐wave infrared region.
Yilin Zhao, Shijia Tan, Deyang Ji, Wenping Hu   +3 more
wiley   +1 more source

Cavity Design in Woodpile Based 3D Photonic Crystals

Applied Sciences, 2018
In this paper, we present a design of a three-dimensional (3D) photonic crystal (PhC) nanocavity based on an optimized woodpile structure. By carefully choosing the position of the defect at the lattice center, we can create a cavity with high symmetry ...
Xu Zheng, Mike P. C. Taverne, Ying-Lung D. Ho, John G. Rarity   +3 more
doaj   +1 more source

Semicylindrical microresonator: excitation, modal structure, and Q factor

, 2020
The semicylindrical microresonator with relatively simple excitation with a plane wave is studied. The resonator is formed on the base of the dielectric/metal/dielectric structure, where the wave energy penetrates into resonator through a thin metal ...
Haroyan, Hovhannes, Nerkararyan, Khachatur, Parsamyan, Henrik, Yezekyan, Torgom   +3 more
core   +1 more source

Optical Kerr Gating as a Strategy for Noise Reduction in Femtosecond Stimulated Raman Spectroscopy

Journal of Raman Spectroscopy, EarlyView.
We report an experimental approach, where an Optical Kerr gate is incorporated with Femtosecond Stimulated Raman Spectrometry (FSRS). The gate functions as a temporal filter that preferentially suppresses the FSRS inherent background. FSRS spectra are reported with the Kerr‐gated methodology with significantly improved SNR compared to the conventional ...
Spyridon Kaziannis, Lazaros Varvarezos, Sotiris Danakas, Elissavet Karkadaki, Cesar Bernando, Miroslav Kloz   +5 more
wiley   +1 more source

Amplitude calibration of 2D mechanical resonators by nonlinear optical transduction

, 2017
Contactless characterization of mechanical resonances using Fabry-Perot interferometry is a powerful tool to study the mechanical and dynamical properties of atomically thin membranes.
Davidovikj, Dejan, Dolleman, Robin J., Steeneken, Peter G., van der Zant, Herre S. J.   +3 more
core   +1 more source